摘要
利用智能蠕动泵和电子天平对4种型号的翻斗式雨量计进行现场率定和误差分析,为野外生态定位观测研究站降雨量的准确观测提供指导。通过调节蠕动泵转速,设置运行时间,电子天平称量泵水量,构建转速与流速的回归方程。同时,根据回归方程和雨量计承雨口面积,计算不同雨强下对应的蠕动泵转速。结果表明:游标卡尺测量的4个雨量计的承雨口均产生了一定的变形,但雨量计承雨口最大面积误差均小于雨量计计量误差要求。在不同雨强模拟下,RG3-M、6466M、TE525MM和52203这4个雨量计的计量误差波动均较大,误差率分别为11.12%~-6.68%、0.32%~-15.59%、-8.73%~-27.43%和-16.45%~-34.13%。误差-雨强回归方程为线性或对数关系,拟合较好。蠕动泵的重复性误差不超过1.0%,大部分在0.6%以内,流量稳定,重复性好,精密程度高。雨强对雨量计计量稳定性有影响,随着雨强增大,雨量计计量稳定性减弱。TE525MM、6466M和52203雨量计的重复性限r值在不同雨强下均小于1.0%,满足国标对雨量计重复性限的要求;而RG3-M雨量计的重复性限r值大于1.0%,无法满足重复性要求。使用智能蠕动泵和电子天平对翻斗雨量计进行室内或现场校验是一种简便可行的方法。根据建立的误差-雨强拟合方程可以对降雨量计量结果进行误差修正,解决翻斗式雨量计误差偏大问题,保证野外生态站观测数据的准确。
To provide guidance for accurate measurement of rainfall in the ecosystem observation and research stations,we conducted field calibration and error analysis of four types of tipping bucket rain gauges by using intelligent peristaltic pump and electronic balance.A regression equation between rotating speed and flow rate was established by adjusting the rotating speed of peristaltic pump,setting the running time,and weighing the pump water.Meanwhile,the peristaltic pump speed under different rain intensities was calculated according to the regression equation and the area of rain gauge.Results of vernier caliper measurement showed that rain ports of the four rain gauges had a certain deformation.The maximum area error rate of rain port of the rain gauges was less than the measurement error requirements of the rain gauges.Under different simulated rainfall intensities,the measurement errors of RG3-M,6466M,TE525MM and 52203 rain gauges fluctuated greatly,with the error rates ranging from 11.12%to-6.68%,0.32%to-15.59%,-8.73%to-27.43%,and-16.45%to-34.13%,respectively.The error-rain intensity regression equations were linear or logarithmic,and the fittings were good.The repeatability errors of peristaltic pump were not more than 1.0%,with most of which under 0.6%.Furthermore,the peristaltic pump flow showed characteristic of high stability,good repeatability,and high precision.The rainfall intensity affected the stability of rain gauge measurement,with increasing rainfall intensity tended to weaken the stability.The repeatability limit r values of TE525MM,6466M,and 52203 rain gauges were less than 1.0%under different rain intensities,meeting the requirements of the national standard for the repeatability limit of rain gauges in China.The repeatability limit r value of RG3-M rain gauge was greater than 1.0%,which could not meet the repeatability requirements.It was a simple and feasible method to use intelligent peristaltic pump and electronic balance to calibrate the tipper rain gauges.The error of rainfall measurement results could be corrected according to the established error-rain intensity fitting equation,which could solve the problem of large error of tipping bucket rain gauge,and thus ensure the accuracy of the observation data of ecosystem research stations.
作者
郑路
李华
马俊旭
李朝英
杨坤
ZHENG Lu;LI Hua;MA Junxu;LI Zhaoying;YANG Kun(Tropical Forestry Experimental Center,Chinese Academy of Forestry,Pingxiang 532600,Guangxi,China;Guangxi Youyiguan Forest Ecosystem Research Station,Youyiguan Forest Ecosystem Observation and Research Station of Guangxi,Pingxiang 532600,Guangxi,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2023年第4期1012-1017,共6页
Chinese Journal of Ecology
基金
广西科技基地和人才专项(桂科AD20159094)
崇左凭祥友谊关森林生态系统广西野外科学观测研究站科研能力建设项目(桂科22-035-130-03)
广西林业科技推广示范项目(桂林科研[2022]第27号)资助。
关键词
生态定位研究站
智能蠕动泵
电子天平
降雨
ecosystem research station
intelligent peristaltic pump
electronic balance
rainfall
